Low variation current multiplier

摘要

Aspects of the present disclosure relate to a current multiplier that can generate an output current with high linearity and/or high temperature compensation. Such current multipliers can be implemented by complementary metal oxide semiconductor (CMOS) circuit elements. In one embodiment, the current multiplier can include a current divider and a core current multiplier. The current divider can generate a divided current by dividing an input current by an adjustable division ratio. The division ratio can be adjusted, for example, based on a comparison of the input current with a reference current. The core current multiplier can generate the output current based on multiplying the divided current and a different current. According to certain embodiments, the output current can be maintained within a predetermined range as the input current to the current divider varies within a relatively wide range.

主权项

1. An apparatus comprising:
a core current multiplier configured to generate an output current that is proportional to a product of a first current from a first current source and a second current from a second current source divided by a third current from a third current source; a compare circuit configured to generate a compare signal based on comparing the first current with a reference current; and a current divider configured to adjust a division ratio responsive to the compare signal; divide the first current, the second current, or the third current by the division ratio; and provide a divider output current to the core current multiplier.